The market is a reflection of the economic cycle.

You must change nothing in your writing without absolute necessity. If it is necessary， then change with simplicity.

好的系统不能具有较弱的命令语言。

"Writing is a way of talking without being interrupted."

唯一使生活成为可能的是永久的、无法忍受的不确定性；不知道接下来会发生什么。

教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。